Refrigeration system

Abstract

A refrigeration system, particularly for controlling the temperature of an environment, and presenting a compressor; a condenser; a laminating thermostatic valve; an evaporator; an evaporation pressure control valve interposed between the outlet of the evaporator and an inlet of the compressor; an economizer in turn presenting a laminating orifice downstream from the condenser, and a flash tank with an inlet communicating with the orifice, a liquid-phase outlet connected to the thermostatic valve, and a gaseous-phase outlet connected to an intermediate inlet of the compressor; and a tapping valve interposed between the outlet of the compressor and the flash tank, and which is opened when the pressure in the flash tank falls below a predetermined threshold value.

I claim: 
     
       1. A system for controlling the temperature of an environment including a refrigeration system (4) having means (10) for compressing a refrigerant; a condenser (16) connected to the outlet (13) of said compressing means (10); a first orifice (25); an evaporator (27) having an inlet (26) connected to said first orifice (25), and an outlet (33) connected to an inlet (11) of said compressing means (10); characterized in that said refrigeration system comprises, in combination: an evaporation pressure control valve (35) interposed between said outlet (33) of said evaporator (27) and said inlet (11) of said compressing means (10);   an economizer (43) having a second orifice (19) connected to the outlet (17) of said condenser (16); and a flash tank (21) having an inlet (20) connected to said second orifice (19), a liquid-phase outlet (23) connected to said first orifice (25), and a gaseous-phase outlet (22) connected to an intermediate inlet (12) of said compressing means (10); and   tapping means (37, 38) connecting said outlet (13) of said compressing means (10) to said inlet (20) of said flash tank (21).   
     
     
       2. A system as claimed in claim 1, characterized in that said tapping means comprise a valve (38) which is opened when the pressure in said flash tank (21) falls below a predetermined minimum threshold value. 
     
     
       3. A system as claimed in claim 1, characterized in that said compressing means comprise a continuous compression compressor (10). 
     
     
       4. A system as claimed in claim 3, characterized in that said compressor (10) is a scroll compressor. 
     
     
       5. A system for controlling the temperature of an environment (2) as claimed in claim 1, and characterized further in that it comprises means (5) for feeding hot air into said environment. 
     
     
       6. A system for controlling the temperature of an environment (2) as claimed in claim 5, characterized in that it further comprises a unit (7) for controlling said refrigeration system (4) and said means (5) for feeding hot air into said environment (2) on the basis of input signals indicating the operating conditions of the system (1).